package com.dzu.gulimall.auth.controller;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.TypeReference;
import com.dzu.common.constant.AuthServerConstant;
import com.dzu.common.exception.BizCodeEnume;
import com.dzu.common.utils.R;
import com.dzu.common.vo.MemberResponseVo;
import com.dzu.gulimall.auth.feign.MemberFeignService;
import com.dzu.gulimall.auth.feign.ThirdPartFeignService;
import com.dzu.gulimall.auth.vo.MessagePhoneVo;
import com.dzu.gulimall.auth.vo.UserLoginVo;
import com.dzu.gulimall.auth.vo.UserRegistVo;
import org.apache.commons.lang.StringUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Controller;
import org.springframework.validation.BindingResult;
import org.springframework.validation.FieldError;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.servlet.http.HttpSession;
import javax.validation.Valid;
import java.util.HashMap;
import java.util.Map;
import java.util.UUID;
import java.util.concurrent.TimeUnit;
import java.util.stream.Collectors;

/**
 * @author by ZhaoDong
 * @Classname LoginController
 * @Description 登录跳转Controller
 * @Date 2021/6/24 19:58
 */
@Controller
public class LoginController {

    @Autowired
    ThirdPartFeignService thirdPartFeignService;

    @Autowired
    StringRedisTemplate redisTemplate;

    @Autowired
    MemberFeignService memberFeignService;
    /**
     * 发送一个请求直接跳转页面。
     *  使用 SpringMVC viewController： 将请求和页面映射起来
     *  GulimallWebConfig
     * @return
     */
    @ResponseBody
    @GetMapping("/sms/sendcode")
    public R sendCode(@RequestParam("phone")String phone){

        String redisCode = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + phone);

        if (StringUtils.isNotEmpty(redisCode)){
            long l = Long.parseLong(redisCode.split("_")[1]);
            if (System.currentTimeMillis() - l < 60000) {
                // 60 不能再发
                return R.error(BizCodeEnume.SMS_CODE_EXCEPTION.getCode(), BizCodeEnume.SMS_CODE_EXCEPTION.getMsg());
            }
        }

        // 接口防刷
        // 验证码的再次校验 ==》 存入redis
        // 存入key-phone value-code sms:code:18753418231 -> 验证码
        String code = UUID.randomUUID().toString().substring(0, 5);
        String substring = code + "_" + System.currentTimeMillis();


        // redis 缓存验证码
        redisTemplate.opsForValue().set(AuthServerConstant.SMS_CODE_CACHE_PREFIX+phone,substring,10, TimeUnit.MINUTES);

        thirdPartFeignService.sendCode(new MessagePhoneVo(phone,code));
        return R.ok();
    }


    /**
     *  重定向携带数据，利用session原理，将数据放到session中。只要跳到下一个页面取出这个数据以后，session里面的数据就会删除
     *  分布式下的session问题
     *
     *  RedirectAttributes redirectAttributes : 来模拟重定向携带数据 (模拟session)
     * @param vo
     * @param result
     * @param redirectAttributes
     * @return
     */
    @PostMapping("/regist")
    public String regist(@Valid UserRegistVo vo, BindingResult result, RedirectAttributes redirectAttributes){

        if (result.hasErrors()) {
            Map<String, String> map = result.getFieldErrors().stream().collect(Collectors.toMap(FieldError::getField, FieldError::getDefaultMessage));
            redirectAttributes.addFlashAttribute("errors",map);

            //Request method POST not supported
            // 用户注册 -》 regist 转发给reg。html  使用的请求转发  原封不动的转给/reg.html
            // 路径映射默认都是get方式访问

            return "redirect:http://auth.gulimall.com/reg.html";
            // 校验出错 转发到注册页面
//            return "forward:/reg.html";
        }

        // 真正的注册 调用远程服务
        // 校验验证码
        String code = vo.getCode();
        String s = redisTemplate.opsForValue().get(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());

        // 登陆 没法 发送验证码了
        s = "1234";

        if (StringUtils.isNotEmpty(s)) {
            if (code.equals(s.split("_")[0])){
                // 删除验证码; 令牌机制。用完就删除
                redisTemplate.delete(AuthServerConstant.SMS_CODE_CACHE_PREFIX + vo.getPhone());

                // 验证码通过 、、真正注册。调用远程服务进行注册
                R regist = memberFeignService.regist(vo);
                if (regist.getCode() == 0) {
                    // 成功
                    return "redirect:http://auth.gulimall.com/login.html";


                } else {
                    HashMap<String, String> map = new HashMap<>();
                    map.put("msg", regist.getData("msg",new TypeReference<String>(){}));
                    redirectAttributes.addFlashAttribute("errors",map);

                    return "redirect:http://auth.gulimall.com/reg.html";

                }

            }else {
                HashMap<String, String> map = new HashMap<>();
                map.put("code", "验证码错误");
                redirectAttributes.addFlashAttribute("errors",map);
                return "redirect:http://auth.gulimall.com/reg.html";
            }
        }else {
            HashMap<String, String> map = new HashMap<>();
            map.put("code", "验证码错误");
            redirectAttributes.addFlashAttribute("errors",map);
            return "redirect:http://auth.gulimall.com/reg.html";
        }

        // 注册成功 返回首页
    }

    @GetMapping("/login.html")
    public String loginPage(HttpSession session) {
        Object attribute = session.getAttribute(AuthServerConstant.LOGIN_USER);
        if (attribute == null) {
            return "login";
        } else {
            return "redirect:http://gulimall.com/index.html";
        }

    }
    @PostMapping("/login")
    public String login(UserLoginVo vo, RedirectAttributes redirectAttributes, HttpSession session) {

        // 远程登陆
        R login = memberFeignService.login(vo);
        if (login.getCode() == 0) {
            // 成功
            String jsonString = JSON.toJSONString(login.get("memberEntity"));
            MemberResponseVo memberResponseVo = JSON.parseObject(jsonString, new TypeReference<MemberResponseVo>() {
            });
            session.setAttribute(AuthServerConstant.LOGIN_USER, memberResponseVo);
            return "redirect:http://gulimall.com/index.html";
//            return "ok,看 GULIMSESSION 的值";
        } else {
            HashMap<String, String> map = new HashMap<>();
            map.put("msg", login.getData("msg", new TypeReference<String>() {
            }));
            redirectAttributes.addFlashAttribute("errors", map);
            return "redirect:http://auth.gulimall.com/login.html";
//            return map.toString();
        }
    }
}
